help. lost icon

alright so i had summerboard on my ipod. and after awhile i wanted to check out customize. but i wasnt sure it it would work if i had summerboard at the same time. so i tried uninstalling summerboard. but it wouldnt uninstall. so i went ahead and installed customize. and then i noticed i no longer had the summerboard settings button. (and no it wasnt invisable [from the customize settings]) i tired uninstalling customize. and nothing happened. and i cant install summerboard again. since its already installed. and it wont let me uninstall it.

is there anyway i can get the summerboard button back, WITHOUT having to delete all my apps first, or restoring my ipod.